Automatic dental mallet



S. E T N A H. R.

\ (Model.)

Automatic Dental Ma11et.

Patented Jne 14, 1881.

WITN-EEEE5` 45 of the eccentric-lever C'.

PATENT OFFICE.

ROBERT n. ANTES, OE GENEsEO, ILLINOIS.

AUTOMAQI'IC DENTAL MALLET.

SPECIFICATION forming part of Letters Patent No. 242,853, dated June 14, 1881.

Application lled March 18, 1881. (Model.)

To all whom t may concern:

Be it known that I, ROBERT H.- ANTES, of Geneseo, in the county of Henry and State of Illinois, have invented certain new and usefnl Improvements in an AutomaticDental Mallet 5 and I do hereby declare the following to be a full, clear, and exact description ot the invention, thatwill enable others skilled in the art to which it appertains to construct and Io make use of the same, reference being had to the accompanying drawings, and to letters of reference marked thereon, forming a part of this Specification.

The object of this invention is to combine with a dental instrument a malleting attachment adapted to have an automatic action; and itA consists in the construction and arrangement of certain mechanism, as will be hereinafter more fully described in detail, and

zo set forth in the claims.

Figure l is a side elevation of a dental instrument embodying my improvement, showing the normal position of the mallet or hammer. Fig. 2 shows a vertical longitudinal section of the sliding sleeve and the position of the mallet when in contact with the spindle or tool-holding shaft, and Fig. 3 a detached detail of construction.

Referring to the drawings, Arepresents a 3o sliding sleeve or hand-grasp, in closing the ver- 'tical shaft Or spindle A'; A2, plugging-tool inserted in the shank end of the shaft A', B, the mallet or hammer, and B' handle to the same.

The sleeve or hand-grasp A moves freely up or down on the shaft A', and is provided with the projecting lug a, to which the lower end of the connecting-rod B2 is attached, the upper end of the connecting-rod being attached to 4o the horizontal lever O, as Shown in the drawings. The inner end of the lever (l is pivoted to the downward-projecting lug a', and the outer end is bifurcated, as shown in Fig. 3 ofthe drawings-so as to embrace the lower end The lever C is provided wth a number of perforations, a2, for the adjustment of the upper end of the connecting-rod B2, for the purpose of shortening` or lengthening the strokeas may be required.

5o The central part of theeccentric-lever C is pivoted to and has an oscillating bearing on' let-handle. The inner end of the arm 02 is 55 perforated and slips on over the upper end of the shaft A', and is secured in position by means of the set-screw D. The inner end of the spring D' is inserted between the under side of the arm C2 and the horizontal projection of the lug a', the parts being held in place by means of the screw D'. The loose end of the spring has a bearing on the under side of the cam a3, which, in connection with the eccentric-lever C', serves to return the mallet to its normal position after the delivery of each blow. .This arrangement entirely dispenses with the necessity of employing an assistant to handle the mallet, and the operator is enabled to accurately regulate the force and rapidity of the blow as circumstances may require.

'Ihe lnallet or hammer employed in connection with this device is provided with a handle composed of wood, which is used in preference to other material for the reason that it imparts to the hammer an elastic vibration or springlike action, which has the effect of causing the hammer to deliver a more penetrating and packing blow than it would do were the handle composed of metal.

Having thus described my invention, what I claim, and desire to Secure by Letters Patent, is- 8 5 1. In an automatic dental mallet, the combination, with the sliding sleeve A, ofthe con! necting-rod B2, the horizontal lever G, the projecting lug a', and the arm (l2, substantially as described.

2. `In an automatic dental mallet, the eccentric-lever C', having the cam-projection ai* and the clip-extension a4 formed integral therewith,as shown and described.

3. In an automatic dental mallet, the combination, with the shaft A', of the arm C2, the eccentric-lever C', pivoted to the outer bifurcated end of said arm, the handle B', and the mallet or hammer B, substantially as herein shown and described.

4. In an automatic dental mallet, the combination, with the arm U2, of the mallet or IOO hammer B, the handle B', the eccentric Vibrating lever G', the spring D', the lug a', and the horizontal lever G, substantially as herein shown and described.

5. In an automatic dental mallet, the combination of lthe following elements, consisting.;` of the sleeve A, the shaft A', the connectingrod B2, the horizontal lever C, the eccentriclever C', provided with the cam-projection p3 and the clip-extension c, the spring D', the io arm C2, the handle B', and the inallet or hammer B, all constructed and arrangedto oper ate as herein shown and described.

ROBERT H. ANTES.

Witnesses:

H. T. ANTES, gno?. STEWART. 

